A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2013 · Q251 Mark

What determines the rate of water movement from the roots to the leaves?

Aabsorption of water through the root hair cells

Bdevelopment of a less negative water potential in the leaves

Cdiffusion of water through the stomata

Devaporation of water from the mesophyll cell walls

✓ Correct answer

D: evaporation of water from the mesophyll cell walls

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2013 Paper 1 Variant 2, question 25.

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